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I just did a LSX 427. However, I did that to make 1000whp. I can praise how great the LSX motor is, but if you're looking to just stay at ~850, then you should look into a forged motor. There really is no point in spending more on a motor if there isn't a need for it. Look into Texas-speed. They offer a lot of different blocks with multiple ways of configuring it.
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